diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index b301c6c8df75..795d81c7a4de 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -886,6 +886,105 @@ static void quirk_clear_strap_no_soft_reset_dev2_f0(struct pci_dev *dev) } } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x15b8, quirk_clear_strap_no_soft_reset_dev2_f0); + +/* + * Enhanced atomic operations can cause corruption with 64-bit DMA + * on these devices. + */ +#define RX_ENH_ATOMIC_EN BIT(8) + +static const u32 nbio_7_7_pcie_smn_addrs[] = { + 0x111401d0, + 0x111411d0, + 0x111421d0, + 0x111431d0, + 0x111441d0, + 0x112401d0, + 0x112411d0, + 0x112421d0, + 0x112431d0, + 0x112441d0, + 0x112451d0, + 0x113401d0, + 0x114401d0, +}; + +static const u32 nbio_7_11_pcie_smn_addrs[] = { + 0x112401d0, + 0x112411d0, + 0x112421d0, + 0x112431d0, + 0x112441d0, + 0x112451d0, + 0x113401d0, + 0x113411d0, + 0x113421d0, + 0x113431d0, + 0x113441d0, + 0x113451d0, +}; + +static void quirk_amd_nbio_enhanced_atomic(struct pci_dev *host_bridge, + const u32 *smn_addrs, + size_t nr_smn_addrs) +{ + bool changed = false; + size_t i; + u32 data; + int ret; + + for (i = 0; i < nr_smn_addrs; i++) { + ret = amd_smn_read(0, smn_addrs[i], &data); + if (ret) + continue; + if (!(data & RX_ENH_ATOMIC_EN)) + continue; + data = data & ~RX_ENH_ATOMIC_EN; + ret = amd_smn_write(0, smn_addrs[i], data); + if (ret) + continue; + if (changed) + continue; + ret = amd_smn_read(0, smn_addrs[i], &data); + if (ret) + continue; + if (data & RX_ENH_ATOMIC_EN) + continue; + changed = true; + } + + if (changed) + pci_info(host_bridge, "enhanced atomics disabled\n"); +} + +static void quirk_amd_nbio_7_7_disable_enhanced_atomic(struct pci_dev *dev) +{ + quirk_amd_nbio_enhanced_atomic(dev, nbio_7_7_pcie_smn_addrs, + ARRAY_SIZE(nbio_7_7_pcie_smn_addrs)); +} + +static void quirk_amd_nbio_7_11_disable_enhanced_atomic(struct pci_dev *dev) +{ + quirk_amd_nbio_enhanced_atomic(dev, nbio_7_11_pcie_smn_addrs, + ARRAY_SIZE(nbio_7_11_pcie_smn_addrs)); +} + +/* Phoenix, Hawk Point (NBIO 7.7) */ +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x14E8, + quirk_amd_nbio_7_7_disable_enhanced_atomic); +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x14E8, + quirk_amd_nbio_7_7_disable_enhanced_atomic); + +/* Strix, Krackan, Strix Halo (NBIO 7.11) */ +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1507, + quirk_amd_nbio_7_11_disable_enhanced_atomic); +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1507, + quirk_amd_nbio_7_11_disable_enhanced_atomic); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x1122, + quirk_amd_nbio_7_11_disable_enhanced_atomic); +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AMD, 0x1122, + quirk_amd_nbio_7_11_disable_enhanced_atomic); + #endif /*